单选题Which line from the output of the show ip interface command indicates a layer 1 problem?（）A Serial0/1 is up, line protocol is downB Serial0/1 is down, line protocol is downC Serial0/1 is up, line protocol is upD Serial0/1 is administratively down, line

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单选题

Which line from the output of the show ip interface command indicates a layer 1 problem?（）

Serial0/1 is up, line protocol is down

Serial0/1 is down, line protocol is down

Serial0/1 is up, line protocol is up

Serial0/1 is administratively down, line protocol is down

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相似问题和答案

第1题：

Which command would you type to see a concise display of which interfaces are up and which are down?()

A.show interfaces brief

B.show interfaces status

C.show ip interface brief

D.show interfaces terse

参考答案：D

第2题：

The fol lowing line of output was extracted from the output of the show ip bgp command on Router R1. Which of the following can be determined from this output?（）Network Next Hop Metric LocPrf Weight Path* 130.1.1.0/28 1.1.1.1 0 1 2 3 4 i

A. The route is learne d from an eBGP peer

B. The route has no more than three ASNs in the AS_PatH

C. The route is the best route for this prefix

D. None of these facts can be positively determined by this output

参考答案：A

第3题：

An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up.

What does "line protocol is up" specifically indicate about the interface?

A．The cable is attached properly.

B．CDP has discovered the connected device.

C．Keepalives are being received on the interface.

D．A carrier detect signal has been received from the connected device.

E．IP is correctly configured on the interface.

正确答案：C
解析：Explanation:
Serial 0/0 is up, line protocol is up is the proper status line condition.
Line serial0/0 is up: This statement represents that the physical connection is good.
Line protocol is up: This represents that the data link layer is OK, meaning that layer 2 keepalives are being received on the interface.
When the line protocol goes down, a possible problem is keep-alives not being sent by remote router.

第4题：

There is a connectivity problem between the serial 0/0 interface of router TESTKING1 and the serial 0/0 interface of TESTKING2. A leased line point to point circuit is installed between these two routers. The output from the "show interface serial 0/0" command is displayed below for each of these routers:From your observations of the above exhibit, what is the underlying cause of the problem?（）

A. The loopback is not set.

B. The serial cable is faulty.

C. The subnet mask is not configured properly.

D. The IP address is not configured properly.

E. The Layer 2 frame types are not compatible.

F. The keepalive setting is not configured properly.

参考答案：E

第5题：

Which command is used to display the placement and direction of an IP access control list on a router?()

A. show access-list

B. show ip route

C. show ip interface

D. show interface

E. show interface list

F. show ip interface brief

参考答案：C

第6题：

Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?

A．Serial0/1 is up, line protocol is down

B．Serial0/1 is down, line protocol is down

C．Serial0/1 is up, line protocol is up

D．Serial0/1 is administratively down, line protocol is down

E．None of the above

正确答案：B
解析：Explanation:
When the physical interface itself is down, then the problem is related to layer 1. When it is up, but the line protocol is down, then the problem is related to layer 2.

第7题：

Which BGP command provides the router ID, local preference, next hop, and BGP path in its output?()

A. show ip route bgp

B. show ip bgp

C. show ip bgp neighbors

D. show ip bgp summary

参考答案：B

第8题：

Which command displays the IPNCP parameters for all connected PPPoA subscribers?()

A. show users

B. show subscriber

C. show ppp interface

D. show ppp interface status ip

参考答案：D

第9题：

Which command can be used to determine the type of cable attached to the Serial 0／0 interface on a router?()

A. show interfaces serial 0/0

B. show running-config

C. show version

D. show controllers serial 0/0

E. show ip interface

F. show line serial 0/0

参考答案：D

第10题：

Which command displays the number of times that the OSPF Shortest Path First (SPF) algorithm has been executed?()

A. show ip protocol

B. show ip ospf

C. sho w ip ospf database

D. show ip ospf interface

参考答案：B

Which line from the output of the show ip interface command

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